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Put not-so-large arrays on the stack, so they end up in IRAM on Iriver and iPod. Approximately doubles decoding speed on Iriver.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8717 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-02-17 18:14:28 +00:00
parent e179291190
commit eaa7e22d98
1 changed files with 3 additions and 3 deletions
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6
apps/plugins/jpeg.c
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@ -392,7 +392,7 @@ void idct8x8(unsigned char* p_byte, int* inptr, int* quantptr, int skip_line)
int * wsptr; int * wsptr;
unsigned char* outptr; unsigned char* outptr;
int ctr; int ctr;
static int workspace[64]; /* buffers data between passes */ int workspace[64]; /* buffers data between passes */
/* Pass 1: process columns from input, store into work array. */ /* Pass 1: process columns from input, store into work array. */
/* Note results are scaled up by sqrt(8) compared to a true IDCT; */ /* Note results are scaled up by sqrt(8) compared to a true IDCT; */
@ -1397,7 +1397,7 @@ int jpeg_decode(struct jpeg* p_jpeg, unsigned char* p_pixel[3],
int downscale, void (*pf_progress)(int current, int total)) int downscale, void (*pf_progress)(int current, int total))
{ {
struct bitstream bs; /* bitstream "object" */ struct bitstream bs; /* bitstream "object" */
static int block[64]; /* decoded DCT coefficients */ int block[64]; /* decoded DCT coefficients */
int width, height; int width, height;
int skip_line[3]; /* bytes from one line to the next (skip_line) */ int skip_line[3]; /* bytes from one line to the next (skip_line) */
@ -1574,7 +1574,7 @@ int jpeg_decode(struct jpeg* p_jpeg, unsigned char* p_pixel[1], int downscale,
void (*pf_progress)(int current, int total)) void (*pf_progress)(int current, int total))
{ {
struct bitstream bs; /* bitstream "object" */ struct bitstream bs; /* bitstream "object" */
static int block[64]; /* decoded DCT coefficients */ int block[64]; /* decoded DCT coefficients */
int width, height; int width, height;
int skip_line; /* bytes from one line to the next (skip_line) */ int skip_line; /* bytes from one line to the next (skip_line) */